Epilepsy, mainly large epileptic seizures (grand mal). Epileptic status with tonic-clonic seizures. Treatment and prevention of epileptic seizures in neurosurgery. In some cases, it can be prescribed for the treatment of heart rhythm disorders caused by organic lesions of the Central nervous system, an overdose of cardiac glycosides. As a second-line drug or in combination with carbamazepine, it is indicated for trigeminal neuralgia.